Progress Indicator throwing Uncaught TypeError: a.match is not a function skuid__SkuidJS:25 , after adding icons to the steps

I'm trying to add icons to Progress Indicator but every time I add an icon it throws an error "Uncaught TypeError: a.match is not a function skuid__SkuidJS:25". What is more bad that it refuse to go even after you remove the icons later. Is this a bug or am I making some mistake.